ML19273B818
| ML19273B818 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/08/1979 |
| From: | Seidle W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7906180163 | |
| Download: ML19273B818 (1) | |
Text
C R 88c UNITED STATES jk oq'o g
NUCLEAR REGULATORY COMMISSION
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REGION IV
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E 611 RYAN PLAZA DRIVE, SUITE 1000
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g AR LINGTON, TE X AS 76011 V*****
May 8,1979 Docket No. 50-445 50-446 Texas Utilities Generating Company ATTN: Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 Gentlemen:
Enclosed is supplement AM to Preliminary Notification PNO-79-67, " Nuclear Incident at Three Mile Island," dated May 7,1979.
Should you have any questions regarding this review, please contact this office.
Sincerely, h)
A (&
W.C.Sei)e, Chief Reactor Construction and Engineering Support Branch
Enclosure:
PN0-79-67AM 7906180l(.3
e IMMEDIATE PRELIMINARY NOTIFICATION May 7 1979 FRELIMINARY NOTIFICATION OF AN EVENT OR UNUSUAL OCCURRENCE - PNO-79-67AM This preliminary notification provides updated information of safety or public interest significance.
Facility:
Three Mile Island Unit 2 Middletown, Pennsylvania
Subject:
NUCLEAR INCIDENT AT THREE MILE ISLAND Op rational Status:
1.
Three of four trains of an independent, additional charcoal filter system are presently in operation.
Iodine concentrations in the gaseous effluent are consistently below continuous release limits and below normally detectable levels most of the time.
2.
Hydrostatic testing of the existing decay heat removal system ("B" loop) is in progress.
3.
The pressurizer has been taken " solid" to demonstrate continued decay heat removal capability with the primary coolant system completely filled and to obtain confirmatory information on pressurizer level.
4.
Measurement of the liquid level inside containment is planned in the o.or future by meneuring the hydrv>LaL16 Lead un the sung) discDarge piping using a recently installed Heise gage-5.
A ceasurement was made of the radioactivity inside the containment building.
It indicates that the present dose level from gases within the building is about 100 R/hr.
nehar radiation o ureco auch..
activity deposited on the containment walls and water on the reactor building floor also contribute to the dose levels in the containment but cannot be directly estimated at this time.
Environmental Status Environmental radiation levels continue to be consistent with natural background levels.
Approximately thirteen minor releases have occurred during the past week (May 1-6) in conjunction with venting of the primary make-up tank.
Aerial and ground surveys taken during these releases indicated radiation 1cvels at background, except for the periods 2000-2100 hrs on 5/I, 1500-2000 hrs on 5/3, and 0700-0800 hrs on 5/4, when aerial measurements reported I-131 at MDA levels and ground survey readings were 0.034 to 0.04 mr/br. During the period May 1-6, approximately 37 air samples were collected and all were less than MDA.
Vegetation samples collected following the releases were all less than MDA.
EPA air and water samples collected during the period April 26 to May 3 showed no evidence of. fission products (0.1-0.2 picoeuries per cubic meter I-131 for air, and 130 picoeuries per liter I-131 for water).
m n n rm a n e r.. TPFP CONTINUED gQyg y {
IMMEDIATE PRELIMINARY NOTIFICATION 7905140253
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Continue ~d May 7, 1979 PNO-79-67AM Page 2
Contact:
RCPaulus, IE x2721.63 DThompson, IE,,s28437 Distribution:
Transmitted H St -PMI Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY Co::nissioner Kennedy Con:sissioner Ahearne C. C. Kammerer, CA (For Distribution)
Cocnissioner Gilinsky'.20 Transmitted:
HNBB 11.
P. Bldg IT"f6 J. G. Davis, IE L. V. Gossick, EDO H. R. Denton, NRR Region I g H. L. Ornstein, EDO R. C. DeYoung, NRR Region II W "LY J. J. Fouchard, PA R. J. Mattson, NRR
' Region III U *.30_
N. M. Haller, MPA V. Stello, NRR Region IV - ti:3J R. G. Ryan, OSP R. S. Boyd, NRR Region V H. K. Shapar, ELD SS Bldg (MAIL)
W. J. Dircks, NMSS J. J. Cumings, OIA S. Levine, RES R. Minogue, SD IE (THI) Site (Provide copy to STATE)
C. Abraham, PA (Middletown - THI-Information Center)
White House Situation Room FDAA (Provide copies to the Administrator and the Operations Center)
EPA DOE /EOC PEMA BRP (State of PA)
DCPA HEW Handenerv (FAA)
IMMEDIATE PRELIMINARY NOTIFICATION e